Upgrading Drupal

After a 4.7 to 5.1 upgrade I'm getting the following error when accessing admin/build/block:

Like many people (and not only drupal users, i'm noticing!) , I got burned by collation troubles as I moved to Drupal 5.1 and Mysql 5, swedish to utf-8 collations. For the most part, the impact of this is to force me to do a global search and replace for various munged bits.

But one of my databases (not all) is having some serious issues…I can edit a node (it doesn't matter if it is a page or a blog post, if it was created before or after the move), but I received the following after I hit submit on the edited node (this does not apply to new nodes).

Any thoughts???

I have upgraded a website from when I try to login I'm getting following error.

Hi

Please guide me on this issue. I have the feedback that upgrading from 4.7 to 5.0 is very difficult and tideous. Rather its better to create the whole site again on 5.0 and import he data? Is it really true.

Secondly can there be optional upgrades, i.e. I upgrade only a particular module.

As I am no developer but a customer, I do not understand as to how to approach the upgrade issue. Please suggest.

Thanks and Regards

I have recently upgraded a website from 4.7.x to 5.1.
Now when a uer try to post as story it get following error.

user warning: Duplicate entry '4-4' for key 1 query: INSERT INTO node (nid, vid, title, type, uid, status, created, changed, comment, promote, sticky) VALUES (4, 4, 'Aussies savour hat-trick', 'story', 1, 1, 1177868566, 1177868566, 2, 0, 0) in /mounted-storage/home50c/sub008/sc34239-FQOW/ims/includes/database.mysqli.inc on line 151.

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Sharique

hi all...upgrade didn't go so well, so i am copying tables. I notice some differences in table structure and I'm wondering if there is a guide that points out what to look for in differences and what data should go where.

thanks for any help